Pneumatic tool for reverse working sewer connections

ABSTRACT

A rotating, air driven working tool which may be placed in a sewer line a distance remote from the operator and be controlled and caused to reverse peen or roll a lead collar thereby securely attaching a house lateral to the primary sewer line. The preferred embodiment of the tool comprises a spring loaded air hammer tiltably secured to a housing containing pressure regulator and oiler connected to an air motor, planetary reduction gears rotatibly drive the lower component and the air hammer. In the secondary embodiment, a reverse tolling tool is utilized in lieu of the air hammer. The tool is positioned and controlled by an extension arm adjustably secured to a lateral tubing insert tiltably supporting a control handle which positions and tensions the tool in operating contact.

United States Patent Dillingham et al.

[4 1 Feb. 19, 1974 PNEUMATIC TOOL FOR REVERSE WORKING SEWER CONNECTIONS [75] inventors: Frank W. Dillingham, Boerne; J. C. Dudley OFiel, Jr., Houston, both of Tex.

[73] Assignee: Shur-Flo, Inc., Houston, Tex.

[22] Filed: Oct. 26, 1972 [21] Appl. No.: 301,229

[52] U.S. Cl 72/76, 72/208, 72/370, 81/52, 81/35, 173/44 [51] Int. Cl. B211) [58] Field of Search.... 72/76, 208, 370; 173/42, 43, 173/44; 81/52.35; 30/103 [56] References Cited UNITED STATES PATENTS 1,953,842 4/1934 Wearne 72/76 1,326,195 12/1919 Hasty 1,849,723 3/1932 Penman 2,072,680 3/1937 McKee 2,491,908 12/1949 Roberts et al. 173/44 8/1934 Smith 173/44 2/1958 Stenuick 173/44 [5 7 ABSTRACT A rotating, air driven working tool which may be placed in a sewer line a distance remote from the operator and be controlled and caused to reverse peen or roll a lead collar thereby securely attaching a house lateral to the primary sewer line. The preferred embodiment of the tool comprises a spring loaded air hammer tiltably secured to a housing containing pressure regulator and oiler connected to an air motor, planetary reduction gears rotatibly drive the lower component and the air hammer. In the secondary embodiment, a reverse tolling tool is utilized in lieu of the air hammer. The tool is positioned and controlled by an extension arm adjustably secured to a lateral tubing insert tiltably supporting a control handle which positions and tensions the tool in operating contact.

11 Claims, 10 Drawing Figures PATENTEI] FEB I 9 I974 SHEEF 1 1F 5 5 REDUCTION i; GEAR i PLANETARY GEAR H BEARING FE G i PATENTEB FEB I QIQM SHEET HF PATENTEDFEB I 91974 sum 3 or 5 PATENTED FEB 1 9 1974 sum 8 m 5 PNEUMATIC TOOL FOR REVERSE WORKING SEWER CONNECTIONS BACKGROUND OF THE INVENTION 1. Field of the Invention This invention pertains to an improved tool to be employed in a method of repairing defective sewer lines. In recent years the technique of relining sewer lines with slightly smaller diameter flexible plastic tubing has been developed. The reconstruction or repair comprises the insertion of a plastic tubing in the old terra cotta sewer followed by a penetration to the old line through the soil from above, the cutting of a new house lateral access into the top of the sewer tubing and the attaching of a new house lateral. The technique of this invention comprises the insertion of a lead collar secured to a plastic sleeve into the new opening into the sewer line. The attaching of a house lateral pipe to the sewer insert and flaring and working the lead collar to securely attach the house lateral to the new sewer insert. The preferred tool of this invention is adapted to be inserted through the house lateral, positioned and retained at the appropriate work level by its configuration and mode of operation. An air hammer is driven from the surface which tilts into position simultaneously driving the device and rotation and progressively flaring and peening the lead collar securely to the sewer insert. The secondary embodiment incorporates a tool which flares and reverse rolls the lead collar.

2. Description of Prior Art Various tools have been designed for flaring, peening, and rolling copper tubing and other malleable tubings such as lead pipe utilized in the application of this invention. The art of relining and reconstructing or rehabilitating existing sewer lines is relatively new in that durable flexible pipe adaptable to pulling through or inserting in existing sewer lines have been developed in recent years. Various connecting techniques have been employed including heat fusing of the new house lateral to the sewer insert. One technique is to employ a collar to secure the house lateral to the new sewer insert. Such a procedure requires excavation of the sewer line in areas frequently demanding the shoring of the walls for the safety of workmen affixing the collar. The latter technique is quite time consuming and results in the expenditure of substantial man hours. Your applicants are not aware of any known tools capable of inserting into house lateral to reverse peen or flare and rolling the lead connecting collar.

SUMMARY OF THE INVENTION The device of this invention can be said to comprise of three major groupings of components. In the preferred embodiment the lower most working component in contact with the lead sleeve to be reverse peened, comprises an air hammer tiltably mounted to the lower extremity of the device. In the alternate embodiment a flaring and reverse rolling working component is employed. The tiltable arrangement is to permit ease of insertion and withdrawal from the work area. The powering of the device shifts the air hammer and the work components outward into engagement with lead collar to be peened or flared and rolled as the work progresses. Within the central body of the device is constructed a suitable planetary gear, reduction gear and drive components which are connected to the enclosed and encased integral air vane motor which is attached to a pressure regulator and oiler. The central body of the device transmits power from. the air vane motor through gear means to slowly rotate the tiltable components as air passing internally through the house components powers the air hammer or rolling tool in the lower components. Attached to the upper extremity of the device is an extension arm and an air power line extending to the surface connected to a suitable source of high pressure air. The extension arm is positioned and controlled by an extension arm connected to the center of the upper section of the housing. This extension arm projects to the surface and is attached to a lateral tubing insert and stabilizes the extension arm. The upper end of the extension arm is adjustably secured to an operating handle employed to tiltably and adjustably position the tool in proper working contact with the lead collar to be peened, flared or rolled. The device may be inserted through a house lateral or an insert house lateral and placed in the proper position by predetermined measurements and adjustments or by feel, and when so positioned and from the external pressure source is admitted to the device the result is a driving in rotation and reverse peening or flaring and rolling of a lead collar attaching the lead collar and sleeve securely to the sewer insert. A six inch fiber glass collar bonded to heavy guage lead sleeve has been reverse peenedand subjected to over O pound tensile pull with the connection continuing to remain securely at tached.

One of the objects of this invention was to permit the penetration into the sewer line from the surface through a small access hole, the insertion of a lead collar and sleeve secured to a new house lateral into an ac cess hole in the sewer insert and reverse work and securely attached the new house lateral to a sewer insert.

FIG. 1 object was to accomplish the repair from the surface with minimum excavation and maximum economy in man hours.

Another object was to develop and provide a device which could be rapidly inserted through the house lateral to the work position and promptly and automatically reverse peen or flare and roll a lead collar connection and permit a shutting off of power to the device and a prompt withdrawing of the tool from the house lateral.

Other objects and advantages and uses of the tool of this invention will be apparent to those skilled in the art after a study of the attached views and the following detailed description of the construction and operation of the device.

BRIEF DESCRIPTION OF THE DRAWINGS Reference is made to the attached several views wherein identical numerals will be utilized to refer to identical or equivalent components throughout the several views and the following detailed description.

F IG.1 is an elevation view partially schematic of the tool positioned in a house lateral projecting into a repaired sewer line.

FIG. 2 is an elevation view primarily schematic of the tool of this invention.

FIG. 3 is a perspective view of a reverse peened lead collar secured to the house lateral and connected to a repaired sewer line.

FIG. 4 is an elevation view of the peening arm.

FIG. 5 is a sectional view partially fragmented illustrating the air hammer, the rotating and tilt components and the spring mounting components.

FIG. 6 is an elevation view of the air hammer.

FIG. 7 is a fragmented view partially in section of the air motor and the associated reduction planetary gear drive means.

FIG. 8 is an elevation view partially sectionalized of the upper attaching components including the air pressure regulator and oiler.

FIG. 9 is a sectional view taken on line 99 of FIG. 8 looking in the direction of the arrows.

FIG. 10 is a sectional view of the working components of the alternate embodiment designed to flare and reverse roll the lead collar.

DESCRIPTION OF THE PREFERRED EMBODIMENT For a description of the method of construction of the device of the preferred embodiment, reference is made to attached FIGS. 1 through 9. For a description of the general arrangement and utilization of the tool, reference is particularly made to FIGS. 1, 2 and 3. The rotating peening tool 10 is placed in the work area through access excavation 11. A penetrating hole is made through the old sewer 12. A hole is cut in sewer insert 13 and a house lateral is placed in position. The extension arm 15 and peening tool 10 is supported through the house lateral 14 by means of a controlled support bracket 16 which is inserted in house lateral 14 by means of an extension arm clamp 17 adjustably secured to extension arm 15. Control handle 18 tiltably and adjustably supports the tool 10 in position about control handle pivot 19. The device is workably positioned and maintained in position adjacent lead collar 20 secured to sleeve 21 into which is inserted house lateral 14.

For an overall discussion of the arrangement of the various components of this invention, your attention is particularly invited to FIG. 2. The rotating peening tool 10 has its central components encased in a steel housing 25 which is constructed of steel tubing internally honed for cylindrical configuration and accurate support and sealing of the internal components. At the upper extremity of the device, FIG. 8 is attaching section 26 from which air supply hose 27 leads to an external source of high pressure air (not shown). The air supply feeds through a pressure regulator 28 and in turn an oiler 29 which are retained in the attaching section 26 by means of mounting brackets 30. Air supply tubing 31 projects upward from the pressure regulator 28 which is interconnected to oiler 29 which, in turn, admits air through inlet tubing 32 projecting downward for and powering components mounted in the central housing 33. These components, FIG. 7, include an air motor 34 which drives a planetary reduction gear 35 powering the output drive section 36 which powers and drives the tilting components 37 and includes an air hammer mounting arm 38 to which is secured air hammer 39 which actuates peening arm 40. Air hammer 39 is powered through air hammer supply tube 41 connected to the interior of central housing 33.

For a detailed discussion of the construction of the air hammer and related components, reference is particularly made to FIGS. 4, 5 and 6. Construction of the air hammer will not be described in detail as to the internal components in that the device is a tool readily available commercially. The air hammer 39 is in common use as a chisel drive tool frequently employed in muffler shops. Machined in the outer housing of the air hammer 39 is hammer mounting groove 42 into which hammer mounting screws 43 may be secured for retaining the air hammer 38 in the desired position in cylinder 58. Constructed in the cylinder 58 is a peening arm slot 44 into which is mounted receiving arm 45 from which extends, parallel to the surface of cylinder 58, peening arm body 46. An arcuate guide collar 47 is preferably constructed with peening arm body 46. Adjacent arcuate guide collar 47 projects a peening foot 48 which comprises the work surface of the tool 10. Cylinder 58 fits over and is positioned by air hammer mounting shaft 49 to which is secured lower guide 50 and upper guide 51 between which is mounted spring 52. Upper guide 51 is slidably mounted on air hammer mounting shaft 49 with spring 52 maintained in compression between lower guide 50 and upper guide 51. Air hammer mounting shaft 49 projects through and is secured in position to tilt arm 53. Tilt arm 53 is retained by suitable, flexible attaching means to tilt arm linkage 54 which is rigidly secured to rotating plate 55. Tilt arm 53 is urged toward rotating plate 55 by means of the interconnecting tilt arm linkage spring 56 with the angle of tilt controlled by adjustable tilt arm linkage stop 57.

For an illustration of the components of the rotating and tilt mechanism, your attention is particularly invited to FIG. 5 which illustrates the components which will place the air hammer 39 in the extended work position. The tilt mechanism is extended by air pressure which moves piston 59 mounted in piston cylinder 63. Plunger 60 projects from rotating plate 55 contacting tilt arm 53. Rigidly secured to rotating plate 55 is rotating shaft 61 to which is attached at its upper extremity drive gear 62. Rotating shaft 61 functions not only as a rotating drive component but serves as a conduit admitting air from the interior of central housing 33 into the internal conduits 64 in rotating plate 55 which admits air not only to piston cylinder 63 driving piston 59 but also admits air to air hammer supply tube 41 which drives air hammer 39.

For a description of the planetary reduction gear components, your attention is particularly invited to FIG. 7. Mounted on suitable shafts in arm 65 is a 28- tooth planetary drive gear 66 having a l2-tooth planetary output gear 67 at one end and a l3-tooth planetary input gear 68 at the opposite end of the planetary gear. These three gears are rotatibly mounted in arm 65 and the gears are integrally constructed or securedly affixed together. The device would operate with one group of planetary gears; however, the preferred embodiment would employ two planetary gears to strength and to balance the load. The l3-tooth planetary input gear 68 .is intermeshed with a 28-tooth fixed gear 69 which is securely attached to reduction gear housing 76. While the l2-tooth planetary output gear 67 is intermeshed and drives 29-tooth drive gear 62.

Reduction gear housing 76, arm 65 as well as shaft bearing cylinder 71 are preferably machined from aluminum billets or other light alloys to conserve weight. Spaced from and mounted around arm 65 is cylindrical steel sleeve planetary arm spacer 70 which supports the compression load between shaft bearing cylinder 71 and reduction gear housing 76 thereby eliminating any compression load on the planetary gear train. Mounted above reduction gear housing 76 is air motor 34 from which projects air motor output shaft 77 on which is securely affixed air motor output gear 78 which intermeshes with receiving gears 79. Receiving gear 79 is rotatibly mounted in reduction gear housing 76 on re ceiving gear shaft 80 at the opposite end of which is affixed first reduction gear 81 which intermeshes with second reduction gear 82 which is mounted on reduction gear drive shaft 84 to which is secured reduction gear output gear 85. This gear 85 intermeshes with and drives planetary drive gear 66.

The relative movement of the 13-tooth planetary input gear 68 about the 28-tooth fixed gear 69 and the rotation of the l2-tooth planetary output gear 67 driv' ing the 29-tooth drive gear 62 produced a satisfactory embodiment. Space requirement will not permit the utilization of a conventional reduction gear train.

Mounted in steel housing 25 above air motor 35 is air motor support cylinder 90 penetrating the support cylinder is air inlet 91 which powers both the air motor 34 and ultimately through internal conduits in the device air hammer 39. Projecting through air motor support cylinder is an air motor outlet orifice 92 to which is secured air motor exhaust pipe 93 connected through tubing to air motor muffler 94.

For a description of the construction of the secondary embodiment designed to flare and reverse roll the lead collar 20, attention is invited to FIG. 10. All of the components from shaft 61 up are identical to structure described above. In this secondary embodiment, a more powerful air motor 34 is preferred. In this modification, the rotating peening tool 10, the output drive section 36, and the tilt components 37 are removed and the components of FIG. substituted therefor.

ln the preferred embodiment, the steel housing 25 encasing the planetary reduction gear 35 and the output drive section 36 was four inches in outside diameter. It is visualized that the rolling tool 100 of this secondary embodiment will be two inches in outside diameter. Most of the major components were machined from an aluminum billet. Exension cylinder 101 has its upper section designed to fit over rotating shaft 61 and to be secured to it by upper drift pin 102 and lower drift pin 103. Extension shaft 104 fits in abutting engagement with rotating shaft 61. Machined at slightly less diameter and fitting in extension cylinder 101 is rolling to'ol piston 105. This structure 105 is generally cylindrical in configuration and has the characteristics of a thick piece of pipe. As an extension of the air passage in rotating shaft 61 is air passage 106 constructed in extension shaft 104. To seal this air above rolling tool piston 105, there is positioned in grooves in piston 105 an inner ,O-ring 107 and an outer O-ring 108. This structure causes piston 105 to move down when pressure is applied to the interior of the extension cylinder 101. Constructed integral with piston 105 or securely attached to it is piston rod 109. This rod 109 operably engages roller arm 110 which for the purpose of durability and rigidity was constructed of heat treated steel. Roller arm 1 10 is constructed in the general configuration indicated in FIG. 10 and is pivotally secured to roller fulcrum 111 which is also constructed of heat treated steel. Roller fulcrum 111 is welded to extension shaft 104. Roller arm 110 is pivotally secured to piston rod 109 by means of piston rod pin 112 in roller arm slot 113. Rod pin 112 is mounted in shaft slot 114 and free to reciprocate in the slot as roller tool piston 105 reciprocates. Roller arm 1 10 is tiltably mounted on roller tilt pin 115 adjacent the end of roller fulcrum 11 1. Roller 116 the work surface of the tool is machined from heat treated steel and mounted on roller axle 117. Mounted between axle 117 and roller 116 is roller sleeve bearing 118. Roller 116 is retained on axle by roller retainer 119. Minor variations in the structure may be made; however, the embodiment illustrated is visualized to operate compatibly with the drive structure of the rotating peening tool 110 and in a measure, the tools are interchangeable.

OPERATION OF THE DEVICE For a general illustration of the utilization of the device, your attention is particularly invited to FIG. 1. The reverse peening tool 10 is inserted in the house lateral 14 to a sufficient depth to place the peening foot 48 slightly below lead collar 20. This distance may be arrived at either by measuring the length of house lateral l4, measuring off an equal distance on extension arm allowing for the length of control support bracket 16 and thereby tightening the extension arm clamp 17 to extension arm 15. Control handle 18 is flexibly secured to extension arm 15 by lift bracket 22. With the device secured in such a position, firm or relaxed contact of foot 48 against the lead! collar 20 is accomplished by the movement of control handle 18. In the event the length of house lateral 14 is unknown, the rotating peening tool 10 may be placed in position by feel or experimental adjustment of extension arm 15. With the components in the position illustrated by FIG. 1 application of high pressure air through air supply hose 27 activates air motor 34 powering the planetary reduc* tion gear means 35. The exhaust from air motor 34 is conducted through the air motor exhaust pipe 93 and muffled by air motor muffler 94. A substantial portion of the air coming through air inlet 91 passes internally through central housing 33 through internal conduit means 64 in shaft bearing cylinder 71 through rotating shaft 61 into conduits in rotating plate which admits air to piston cylinder 63 activating piston 59 extending plunger which extends tilt arm 53. Air to power air hammer 39 is supplied through conduit means 64 in rotating plate 55 to the hammer air supply tube 41 which drives and activates air hammer 39. The vibration of air hammer 39 in contact with receiving arm 45 through peening arm body 46 supported by guide collar 47 thereby powers and drives peening foot 48 in contact with lead collar 20. The initial contact of lead collar 20 tends only to flare the collar in the hole in sewer insert 13. Control support bracket 16 through various associated components and control handle 18 hold extension arm 15 in a relatively fixed position, which in turn supports in a fixed position non-rotating components of the rotating peening tool 10. All components of the device below the shaft bearing cylinder 71 are slowly rotated while air hammer 39, and in turn, peening arm 40 is driven in reciprocating and rotating motion with foot 48 in contact with lead collar 20. This results in a secure peening and retention of the lead collar 29 to sewer insert 13.

A very simplified version of this device could comprise a direct attaching of extension arm 15 to a simplified version of rotated peening tool 10 comprising mounting means for air hammer 39 and the equivalent of receiving arm 45, peening arm body 46, peening foot 48. Such a device could be used successfully to reverse peen lead collar 20 through a corresponding hole in sewer insert 13. Such a hand held hand rotated device has been constructed and successfully used by your inventors. Accordingly, the broadest concept of this invention is believed to be incorporated in such a simplified version of this device. The preferred embodiment, however, is the automatically rotating, reciprocating versions illustrated in the detailed description and FIGS. 1 through 8.

The utilization of the device of this invention incorporating the rolling tool 100 is quite similar to the preferred embodiment described above. The surface components such as the extension arm 15 controls support bracket 16, and control handle 18 continues to be utilized. The planetary reduction gear 35 are identical in the preferred embodiment and the secondary embodiment. Accordingly, the components continue to function in a similar manner. With the rolling tool 100 securely affixed to rotating shaft 61, the device is assembled for placing in the work area through the house lateral 14. Positioning may be made by measuring or feel as previously described. With the rolling tool 100 in the proper position, the powering of the device initially activates the rotating drive components and through air passage 106 rolling tool piston 105 moves downward in extension cylinder 101. Piston rod 109 moves rod pin 112 downward in shaft slot 114. This action causes roller arm 110 to tilt aboutroller tilt pin 115 projecting roller 116 up and outward contacting lead collar 20. The tensioning of the rotating working tool from the surface through the extension arm holds roller 116 firmly in engagement with lead collar 20 as the tool is driven in rotation flares and rolls lead collar 20 attaching house lateral 14 securely in sewer insert 13. The shutting off of the air supply to the tool 100 in the secondary embodiment results in spring 120 retracting piston rod 109 and piston 105. The reverse operation of the linkage retracts roller 1 16 after which the tool may be withdrawn from the house lateral 14. This secondary embodiment is visualized as another embodiment in which the planetary reduction gear 35 and associated components may be usefully employed.

Having illustrated and described in detail the construction of the device and its useful operation, what is desired to be claimed is all embodiments of the device not departing from the scope or equivalents of the invention as defined in the appended claims.

I claim:

1. A pneumatic tool for reverse working a sewer connection comprising:

a. a central housing encasing,

b. an air motor, said air motor driving,

0. a planetary reduction gear, said reduction gear further comprising:

1. an output gear, said output gear engaging and driving,

2. a planetary drive gear, said planetary drive gear securely affixed on a common axis to,

3. a planetary output gear, and

4. a planetary input gear, said planetary input gear engaging,

5. a stationary fixed gear and said planetary output gear engaging and driving,

6. a rotatible output gear,

7. said planetary drive gear, input gear, and output gear rotatibly mounted in a planetary arm with said arm rotatibly mounted in said central housing relative to said fixed gear,

(1. a pneumatic reverse working tool secured to said central housing, said tool having:

1. a rotary shaft means for receiving rotary motion from said rotatible output gear,

2. a pneumatic drive means for moving a working surface into contact with a malleable collar in a sewer line, and

3. pneumatic driven motion means for reverse working a malleable collar, and

e. an extension arm means for supporting said pneumatic reverse working tool in a sewer line.

2. The invention of claim 1 wherein said pneumatic reverse working tool comprises:

a. an air hammer positioning means attached to said rotary shaft, said means adapted to position an air hammer in a conduit,

, b. an air hammer having a thrust stroke and a retract stroke, said hammer secured to said positioning means, and

c. a peening arm mounted adjacent said air hammer, said peening arm positioned to receive the thrust stroke of said air hammer and adapted to impart the force of the thrust stroke to a surface to be reverse peened.

3. The invention of claim 2 wherein said air hammer positioning means further comprises:

a. a rotary plate mounted on said rotary shaft,

b. a tilt arm linkage projecting from said rotary plate,

0. a tilt arm flexibly attached to said linkage,

d. an air hammer mounting arm securely mounted on said tilt arm, and

a pneumatic driven plunger adapted to contact and tilt said tilt arm thereby placing said air hammer in an extended working position.

4. The invention of claim 1 wherein said reverse working tool comprises:

a. a rolling tool mounted on said rotary shaft, said rolling tool further comprising,

b. an extension cylinder securely attached to said rotary shaft,

c. a rolling tool piston reciprocately mounted in said cylinder,

d. an extension shaft mounted at the center of and on the prolonged axis of said cylinder and said piston,

e. tiltable linkage means secured to said extension shaft, said tiltable linkage means extending responsive to reciprocation of said piston, and

f. a roller comprising a working surface mounted on said tiltable linkage, said roller adapted to contact and reverse work a malleable collar in a sewer line.

5. The invention of claim 1 including:

a. a conduit means for receiving compressed air from an external source,

b. a pressure regulator in said conduit,

c. an oiler in said conduit,

(1. internal passages within said central housing capable of conducting oil and air through the internal components to said pneumatic reverse working tool thereby lubricating internal components within the said central housing.

6. The invention of claim 1 wherein:

a. said planetary input gear has a greater number of teeth than said planetary output gear, and

b. said stationary fixed gear has a lesser number of teeth than said rotatible output gear.

7. The invention of claim 1 further comprising a reduction gear intermediate said air motor and said planetary reduction gear.

8. The invention of claim 1 wherein said extension arm means furthpr comprises:

a an elongated extension arm securely attached to said central housing and extending to an operator end,

b. a central support bracket constructed and arranged to support a tool in a conduit,

c. a control handle pivotally secured to said central support bracket, and

d. a tiltable control handle mounted on said extension arm and said control handle pivotally moving said pneumatic reverse working tool responsive to the movement of said handle.

9. In a pneumatic tool for reverse working a sewer connection the subcombination comprising:

a. an extension arm having an upper extremity and a lower extremity, said lower extremity secured to,

b. an air hammer mounting means,

c. an air hammer having a thrust stroke and retract stroke, said hammer secured to said mounting means retaining said hammer in the position with the thrust stroke projecting toward the upper extremity of said extension arm, and

d. a peening arm secured adjacent said air hammer adapted to receive the thrust stroke of said hammer and impart said thrust stroke to a surface to be peened in the direction of the upper extremity of said extension arm.

10. The invention of claim 9 further comprising an air hammer positioning means in association with said air hammer constructed and arranged to position said air hammer in a conduit.

11. The invention of claim 9 further comprising:

a. a central support bracket constructed and arranged to support an air hammer in conduit,

b. a control handle pivot secured to said central support bracket, and

c. a tiltable control handle mounted on said extension arm, said control handle pivotally moving said air hammer responsive to the movement of said handle. 

1. A pneumatic tool for reverse working a sewer connection comprising: a. a central housing encasing, b. an air motor, said air motor driving, c. a planetary reduction gear, said reduction gear further comprising:
 1. an output gear, said output gear engaging and driving,
 2. a planetary drive gear, said planetary drive gear securely affixed on a common axis to,
 3. a planetary output gear, and
 4. a planetary input gear, said planetary input gear engaging,
 5. a stationary fixed gear and said planetary output gear engaging and driving,
 6. a rotatible output gear,
 7. said planetary drive gear, input gear, and output gear rotatibly mounted in a planetary arm with said arm rotatibly mounted in said central housing relative to said fixed gear, d. a pneumatic reverse working tool secured to said central housing, said tool having:
 1. a rotary shaft means for receiving rotary motion from said rotatible output gear,
 2. a pneumatic drive means for moving a working surface into contact with a malleable collar in a sewer line, and
 3. pneumatic driven motion means for reverse working a malleable collar, and e. an extension arm means for supporting said pneumatic reverse working tool in a sewer line.
 2. a pneumatic drive means for moving a working surface into contact with a malleable collar in a sewer line, and
 2. a planetary drive gear, said planetary drive gear securely affixed on a common axis to,
 2. The invention of claim 1 wherein said pneumatic reverse working tool comprises: a. an air hammer positioning means attached to said rotary shaft, said means adapted to position an air hammer in a conduit, b. an air hammer having a thrust stroke and a retract stroke, said hammer secured to said positioning means, and c. a peening arm mounted adjacent said air hammer, said peening arm positioned to receive the thrust stroke of said air hammer and adapted to impart the force of the thrust stroke to a surface to be reverse peened.
 3. The invention of claim 2 wherein said air hammer positioning means further comprises: a. a rotary plate mounted on said rotary shaft, b. a tilt arm linkage projecting from said rotary plate, c. a tilt arm flexibly attached to said linkage, d. an air hammer mounting arm securely mounted on said tilt arm, and e. a pneumatic driven plunger adapted to contact and tilt said tilt arm thereby placing said air hammer in an extended working position.
 3. a planetary output gear, and
 3. pneumatic driven motion means for reverse working a malleable collar, and e. an extension arm means for supporting said pneumatic reverse working tool in a sewer line.
 4. a planetary input gear, said planetary input gear engaging,
 4. The invention of claim 1 wherein said reverse working tool comprises: a. a rolling tool mounted on said rotary shaft, said rolling tool further comprising, b. an extension cylinder securely attached to said rotary shaft, c. a rolling tool piston reciprocately mounted in said cylinder, d. an extension shaft mounted at the center of and on the prolonged axis of said cylinder and said piston, e. tiltable linkage means secured to said extension shaft, said tiltable linkage means extending responsive to reciprocation of said piston, and f. a roller comprising a working surface mounted on said tiltable linkage, said roller adapted to contact and reverse work a malleable collar in a sewer line.
 5. a stationary fixed gear and said planetary output gear engaging and driving,
 5. The invention of claim 1 including: a. a conduit means for receiving compressed air from an external source, b. a pressure regulator in said conduit, c. an oiler in said conduit, d. internal passages within said central housing capable of conducting oil and air through the internal components tO said pneumatic reverse working tool thereby lubricating internal components within the said central housing.
 6. The invention of claim 1 wherein: a. said planetary input gear has a greater number of teeth than said planetary output gear, and b. said stationary fixed gear has a lesser number of teeth than said rotatible output gear.
 6. a rotatible output gear,
 7. said planetary drive gear, input gear, and output gear rotatibly mounted in a planetary arm with said arm rotatibly mounted in said central housing relative to said fixed gear, d. a pneumatic reverse working tool secured to said central housing, said tool having:
 7. The invention of claim 1 further comprising a reduction gear intermediate said air motor and said planetary reduction gear.
 8. The invention of claim 1 wherein said extension arm means further comprises: a. an elongated extension arm securely attached to said central housing and extending to an operator end, b. a central support bracket constructed and arranged to support a tool in a conduit, c. a control handle pivotally secured to said central support bracket, and d. a tiltable control handle mounted on said extension arm and said control handle pivotally moving said pneumatic reverse working tool responsive to the movement of said handle.
 9. In a pneumatic tool for reverse working a sewer connection the subcombination comprising: a. an extension arm having an upper extremity and a lower extremity, said lower extremity secured to, b. an air hammer mounting means, c. an air hammer having a thrust stroke and retract stroke, said hammer secured to said mounting means retaining said hammer in the position with the thrust stroke projecting toward the upper extremity of said extension arm, and d. a peening arm secured adjacent said air hammer adapted to receive the thrust stroke of said hammer and impart said thrust stroke to a surface to be peened in the direction of the upper extremity of said extension arm.
 10. The invention of claim 9 further comprising an air hammer positioning means in association with said air hammer constructed and arranged to position said air hammer in a conduit.
 11. The invention of claim 9 further comprising: a. a central support bracket constructed and arranged to support an air hammer in conduit, b. a control handle pivot secured to said central support bracket, and c. a tiltable control handle mounted on said extension arm, said control handle pivotally moving said air hammer responsive to the movement of said handle. 